Susan



(No Model.)

\ J. A. KNOWLES, Jr., Deod.

s. M. KNOWLES, Executrix. WEIGHING SCALE.

Patented Mar. 9, 1886.

N, PETERS, Phomulho m hw. Washinglon, D C.

UNITED STATES PATENT rricn,

JOHN A. KNOWVLES, J E, OF LOWELL, MASSACHUSETTS; SUSAN M. KNOWLES(EXECUTRIX OF SAID JOHN A. KNOWVLES, JR., DECEASED) ASSIGNOR TO WILLIAMH. THOMPSON, OF SAME PLACE.

WElGHlNG-SCALE.

SPECIFICATION forming part of Letters Patent No. 337,772, dated March 9,1886.

Application filed January 10, i884. Serial No. 116,084.

To aZZ whom it may concern:

Be it known that I, JOHN A. KNOWLES, the younger of that name, a citizenof the United States, residi ng at Lowell, in the county ot'llIiddlesexand Commonwealth of lliassachusetts,

have invented certain new and useful Improvements in Scale-Beams, ofwhich the following is a specification.

My invention relates to a scale having the scale-beam inclined, ashereinafter described, to enable the same to be easily examined; to theconstruction of the beam; to means for holding the oounterpoise fromslipping on the brace or tare beam, and to means whereby thecounterpoise may be immediately set without trial to balance a pan,scoop, or other receptacle of known weight.

In the accompanying drawings, Figure 1 is an isometric view of a scaleprovided with my 2.1; improvements; Fig. 2, a side elevation of the mainbeam and parts supported thereon; Fig.

8, an enlarged side elevation of a part of the same, with portions insection; Fig. 4, a vertical cross-section on the line as in Fig. 2

2 Fig. 5, a central longitudinal vertical section through thecounterpoise; Fig. 6, a vertical crosssection on the line 3 y in Fig. 3,omitting the sliding weight on the upper graduated scalc-beam; Fig. 7,an end elevation of 0 the outer anglepiece, scale-beams, and brace;

Fig. 8, a side elevation of the outer anglepiece and the scale-beamsattached, a sliding poise, the lower part ofthe angle-piece being insection to show the attachment of the rare- 5 beam or brace; Figs. 9 and10, oblique views,

which represent another way of attaching the tare-beam to the main beam,Fig. 9showinga part of the main beam and brace formed in one piece witheach other, Fig. 10 the other 0 end of the braceand theangle-piececonnected thereto; Fig. 11, an enlarged view of the upper part of thestandard and a portion of the main beam; Fig. 12, a side elevation ofpart of the scale-beams with sliding poises thereon,

5 a part of the upper poise being broken away to show the recess in thepoiseand the projection on the scale-beam.

The platform A, containingthe usual levers,

the column or hollow standard B, connecting- (No model.)

rod C, the beam-head loop D, pivots E E, screw F, balance-ball G, scoopH, and beamhead staple J are all of the ordinary construction andoperation.

The beam is constructed in parts,as follows:

A butt or main beam, I, to which the screw F 5 and the pivots E E aresecured in the usual manner. The angle-piece or angle-bracketK is inform somewhat like a letter T; but the topis inclined to the shank, asshown, and the vertical part or shank of the bracket K is 6 screwed orotherwise secured to one of the faces of the main beam. Upon theinclined top of the bracket is screwed one end of one or morescale-beams, L L, as shown, the other end of such scale-beam beinglikewise secured to 6 the inclined top of a similar bracket, K. Thesescalebeams are figured in the usual manner, for the usual purpose. Thebracket last named is provided with a screw-threaded hole, K", and thebeam is provided also with 7 a screw-threaded hole, K and a brace orrod, K, which is threaded at the ends, enters said holes and serves tostiffen the scale-beams and prevent their sagging.

The described construction places the gradu- 7 ated and figured surfaceof the scale-beams at such an angle that they may be easily read withoutstooping.

The sliding poises L L are of the usual construction, except that theupper one, L", is provided with a slight recess, L*, which leads out ofthe slot which receives the scale-beam. The upper edge of the scale-beamis provided with a projection, If, which enters said recess when thepoise is nearest thefulcruin and pre- 8 vents said poise from beingjarred or accidentally moved along on the scale-beam. The brace alsoserves as a tare-beam and supports a ball or counterpoise, K having acentral hole, K, to receive said brace or tare beam, 0 and a groove, K,parallel with and opening into said hole throughout its length. Midwaybetween the ends of the groove a hole, K leads from said groove outward,and aspring, K, bent at the middle into a loop, K, as shown in Figs.8and 5, is placed in said groove, with the loop in said hole, and thebrace be ing placed through the hole the spring bears 2 saw/72 upon thebrace and prevents the counter-poise from sliding on said brace or beingunintentionally moved.

In order that the tare ofascoop or other receptacle placed on theplatform may be allowed for withoutthetronble of weighingsneh receptacleevery time it is used, I apply tothe brace or tare beam a stop collar,M, provided with a set-screw, i which turns in said collar and thrustsagainstsaid tarebeam'. When the scale is used without the scoop, thecounterpoise is moved up against the butt or main beam, but when thescoop is used the counterpoise is moved out against the stop-collar, thestop-collar having been previously set at a point where the scale willbalance when the empty pan is placed on the platform, thecoulr terpoiseis moved up to said collar, and the poises are at the zero-mark. Whenthe pan becomes worn from use, so as to weigh less, the collar may setnearer the fulcrum; or ifa heavier pan is used the stop-collar, may bemoved outward on the tare-beam.

In the modification shown in Figs. 9 and 10 the brace is formed in onepiece with the main beam, and the shanks of the angle-pieces areattached to the main beam and brace, just as the angle-piece in Figs. 3and 6 is attached to the main beam. 7

I claim as my invention The combination of the tare beam orbrace, theweight provided with a holeand a groove extending through the same, andwith another hole leading into said groove, and the spring bent asdescribed, as and. for the purpose specified.

JOHN A. KNOWLES, JR.

Witnesses:

ALBERT M. MOORE, EDW. W. THOMPSON.

